sunnyfun888

Hi [@wjhuang2016](https://github.com/wjhuang2016), We're trying to migrate a legacy system from MySQL to TiDB. During the migration research, this issue was found. There're a variety of data types in the json(string,...

> The problem is that the expression type and the generated column type need to be strictly equal. MySQL doesn't follow it, and it causes a bug in MySQL. For...

> If users can accept the possible wrong result, it's ok the do this optimization. But when designed this feature, we tend to choose the correctness. I agree and can...